AU3891301A - Sulphur dioxide generator - Google Patents
Sulphur dioxide generator Download PDFInfo
- Publication number
- AU3891301A AU3891301A AU38913/01A AU3891301A AU3891301A AU 3891301 A AU3891301 A AU 3891301A AU 38913/01 A AU38913/01 A AU 38913/01A AU 3891301 A AU3891301 A AU 3891301A AU 3891301 A AU3891301 A AU 3891301A
- Authority
- AU
- Australia
- Prior art keywords
- sulphur dioxide
- coating
- sheet
- substance
- sheets
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 title claims description 52
- 239000004291 sulphur dioxide Substances 0.000 title claims description 26
- 235000010269 sulphur dioxide Nutrition 0.000 title claims description 26
- 238000000576 coating method Methods 0.000 claims description 28
- 239000011248 coating agent Substances 0.000 claims description 24
- 239000002131 composite material Substances 0.000 claims description 16
- 239000000126 substance Substances 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 11
- 239000000843 powder Substances 0.000 claims description 7
- 239000000758 substrate Substances 0.000 claims description 6
- 239000004033 plastic Substances 0.000 claims description 4
- 229920003023 plastic Polymers 0.000 claims description 4
- 240000007594 Oryza sativa Species 0.000 claims 1
- 235000007164 Oryza sativa Nutrition 0.000 claims 1
- 235000009566 rice Nutrition 0.000 claims 1
- 239000000123 paper Substances 0.000 description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 239000000203 mixture Substances 0.000 description 5
- -1 polyethylene Polymers 0.000 description 5
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 description 4
- 239000004698 Polyethylene Substances 0.000 description 3
- 241000219094 Vitaceae Species 0.000 description 3
- 230000002378 acidificating effect Effects 0.000 description 3
- 235000021021 grapes Nutrition 0.000 description 3
- 239000002655 kraft paper Substances 0.000 description 3
- 239000012939 laminating adhesive Substances 0.000 description 3
- 229920000573 polyethylene Polymers 0.000 description 3
- VZCYOOQTPOCHFL-OWOJBTEDSA-N Fumaric acid Chemical compound OC(=O)\C=C\C(O)=O VZCYOOQTPOCHFL-OWOJBTEDSA-N 0.000 description 2
- 235000010265 sodium sulphite Nutrition 0.000 description 2
- 241000233866 Fungi Species 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- RMGVZKRVHHSUIM-UHFFFAOYSA-L dithionate(2-) Chemical compound [O-]S(=O)(=O)S([O-])(=O)=O RMGVZKRVHHSUIM-UHFFFAOYSA-L 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000001530 fumaric acid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 235000016337 monopotassium tartrate Nutrition 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- KYKNRZGSIGMXFH-ZVGUSBNCSA-M potassium bitartrate Chemical compound [K+].OC(=O)[C@H](O)[C@@H](O)C([O-])=O KYKNRZGSIGMXFH-ZVGUSBNCSA-M 0.000 description 1
- 229940081543 potassium bitartrate Drugs 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
- B65D81/24—Adaptations for preventing deterioration or decay of contents; Applications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants
- B65D81/28—Applications of food preservatives, fungicides, pesticides or animal repellants
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23B—PRESERVING, e.g. BY CANNING, MEAT, FISH, EGGS, FRUIT, VEGETABLES, EDIBLE SEEDS; CHEMICAL RIPENING OF FRUIT OR VEGETABLES; THE PRESERVED, RIPENED, OR CANNED PRODUCTS
- A23B7/00—Preservation or chemical ripening of fruit or vegetables
- A23B7/14—Preserving or ripening with chemicals not covered by groups A23B7/08 or A23B7/10
- A23B7/144—Preserving or ripening with chemicals not covered by groups A23B7/08 or A23B7/10 in the form of gases, e.g. fumigation; Compositions or apparatus therefor
- A23B7/152—Preserving or ripening with chemicals not covered by groups A23B7/08 or A23B7/10 in the form of gases, e.g. fumigation; Compositions or apparatus therefor in a controlled atmosphere comprising other gases in addition to CO2, N2, O2 or H2O ; Elimination of such other gases
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
- Y10T428/1303—Paper containing [e.g., paperboard, cardboard, fiberboard, etc.]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
- Y10T428/131—Glass, ceramic, or sintered, fused, fired, or calcined metal oxide or metal carbide containing [e.g., porcelain, brick, cement, etc.]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
- Y10T428/1334—Nonself-supporting tubular film or bag [e.g., pouch, envelope, packet, etc.]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
- Y10T428/1352—Polymer or resin containing [i.e., natural or synthetic]
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mechanical Engineering (AREA)
- Pest Control & Pesticides (AREA)
- General Chemical & Material Sciences (AREA)
- Wood Science & Technology (AREA)
- Zoology (AREA)
- Polymers & Plastics (AREA)
- Laminated Bodies (AREA)
- Packages (AREA)
- Wrappers (AREA)
Description
'1 1
AUSTRALIA
Patents Act 1990 Grapetek (Proprietary) Limited
ORIGINAL
COMPLETE SPECIFICATION STANDARD PATENT Invention Title: Sulphur dioxide generator The following statement is a full description of this invention including the best method of performing it known to us:-
(I
-2- FIELD OF THE INVENTION THIS INVENTION relates to sulphur dioxide generators.
BACKGROUND TO THE INVENTION Sulphur dioxide generators are placed in cartons containing table grapes, the gaseous sulphur dioxide in the carton preventing the growth on the oooo• grapes of certain forms of fungi. Where the grapes are to be shipped over long distances it is conventional to use two stage generators. These generate sulphur dioxide relatively rapidly when first placed in the carton. The fast rate of release lasts for a few days and thereafter sulphur dioxide is released at a much slower rate loll over a period of several weeks.
Various forms of two stage generator are available commercially. The S, following four types are known to Applicant:- Type 1. This generator is in two parts. The first part consists of a sheet of a material such as Kraft paper which is pervious to water vapour and sulphur dioxide gas. One face of the sheet has thereon a coating comprising a binder which has dispersed therein a substance, or mixture of substances, which generates sulphur dioxide in the presence of water. The second part comprises two sheets of Kraft -3paper secured together along a pattern of intersecting lines. The lines and the sheets bound a plurality of pockets. Each pocket has therein, in powder form, the substance(s) which when exposed to water vapour generates sulphur dioxide. The sheets are pervious to both water vapour and sulphur dioxide gas. One first part and one second part are placed in each carton.
Type 2. This comprises three sheets of material. One sheet is of paper, such as Kraft paper, and the other two are of what is called poly coated paper. The coating is of polyethylene. The paper sheet is one of the outside sheets. The sequence of layers is paper, polycoating, paper, o~opolycoating, paper. All three sheets are secured together along a pattern of intersecting lines by heat sealing them together. This forms a series of pockets on each side of the centre polycoated paper sheet, each pocket being bounded by said lines and by two of the sheets. All 0-o15: the pockets contain sulphur dioxide generating substance(s). The paper sheet is more readily penetrated by water vapour than the poly coated sheets. Hence moisture reaches the pockets between the paper sheet and the polycoating of one poly coated sheet before it reaches the pockets between the two poly coated sheets.
Type 3. This generator also comprises three sheets of material, two of them being poly coated and secured together along lines which bound a -4series of pockets with sulphur dioxide generating substances therein.
To this extent the type 3 generator is similar to type 2. However, the third sheet, which is a paper sheet, is laminated to the face of one of the poly coated sheets by a laminating adhesive which has sulphur dioxide generating substance dispersed in it. Water vapour penetrates the paper sheet and reaches the laminating adhesive, and the generating substance dispersed in the laminating adhesive, before it penetrates the poly coated sheets and reaches the pockets between S* the poly coated sheets.
Type 4. This generator comprises two thin plastic films laminated together using a wax which has sulphur dioxide generating material dispersed •co• therein. The outer face of one of the films carries a coating of sulphur dioxide generating material. The coating is covered by a sheet of nonwoven material. The coating provides first stage generation and the generating material between the films provides second stage generation.
The present invention seeks to provide an improved form of two stage sulphur dioxide generator.
BRIEF DESCRIPTION OF THE INVENTION According to the present invention there is provided a sulphur dioxide generator comprising a first composite sheet comprising a paper substrate with a coating of weldable synthetic plastics material on one face thereof, a second composite sheet comprising a paper substrate with a first coating of a substance which, in the presence of moisture, generates sulphur dioxide and a second coating of a weldable synthetic plastics material thereon, the first coating being between the paper substrate and the second coating, the weldable coatings being secured to one another in such manner as to provide a series of closed pockets between the composite sheets, each pocket having a substance therein which, in the presence of ooooo moisture, generates sulphur dioxide, this substance being in powder form.
10: BRIEF DESCRIPTION OF THE DRAWINGS For a better understanding of the present invention, and to show how oo o the same may be carried into effect, reference will now be made, by way of example, to the accompanying drawing in which:- Figure 1 is a top plan view of a two stage sulphur dioxide generator in accordance with the present invention, layers of the generator being broken away to show the construction; and Figure 2 is a diagrammatic section on the line I-11 of Figure 1, Figure 2 being drawn to an exaggerated scale.
DETAILED DESCRIPTION OF THE DRAWINGS The two stage generator 10 illustrated in the drawings comprises a -6composite top sheet 12 and a composite bottom sheet 14. The top sheet consists of a paper sheet 16 which has a polyethylene coating 18 on the under surface thereof.
The composite bottom sheet 14 comprises a paper sheet 22 which has two coatings on the top face thereof, the top coating being designated 24 and being of polyethylene and the coating 26 which is between the sheet 22 and the coating 24 being of a substance which, in the presence of moisture, generates sulphur dioxide. The substance can be sodium metabisulphate, an acidic mixture ooooo comprising sodium sulphite and fumaric acid, an acidic mixture comprising sodium sulphite and potassium bitartrate or a mixture of both these acidic mixtures. Coating .ooe° can be carried out using conventional coating apparatus, the coating 26 being ooooo applied before the coating 24.
•*oo The composite top sheet 12 and the composite bottom sheet 14 are welded to one another along a series of longitudinal and transverse lines 28. This is *i achieved by feeding the composite top sheet 12 and the composite bottom sheet 14 between two heated rollers one of which has a pattern of axially extending bars and circumferentially extending rings.
Before the composite top sheet 12 is fed onto the composite bottom sheet 14 and the sheets are heat sealed together, a small amount of gas generating substance, in powder form, is fed onto the bottom composite sheet. The places where the powder lies are not welded together and thus, once the sheets are joined, -7the powder is in the pockets designated 30 each of which is bounded by four of the lines 28 and by the composite top and bottom sheets 12 and 14.
Water vapour penetrates the sheet 22 and reacts with the coating 26 to provide the fast, initial release. Thereafter the water vapour penetrates the coatings 18 and 24 to reach the powder in the pockets
Claims (2)
1. A sulphur dioxide generator comprising a first composite sheet comprising a paper substrate with a coating of weldable synthetic plastics material on one face thereof, a second composite sheet comprising a paper substrate with a first coating of a substance which, in the presence of moisture, generates sulphur dioxide and a second coating of a weldable synthetic plastics material thereon, the first coating being between the paper substrate and the second coating, the weldable coatings being secured to one another in such manner as to provide a series of closed pockets between the composite sheets, each pocket having a substance therein which, in the presence of moisture, generates sulphur dioxide, this substance being in powder form.
2. A sulphur dioxide generator substantially as hereinbefore described *o with reference to the accompanying drawing. S DATED THIS 27th day of April 2001 GRAPETEK (PROPRIETARY) LIMITED Patent Attorneys for the Applicant:- F B RICE CO
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ZA200005535 | 2000-10-10 | ||
| ZA2000/5535 | 2000-10-10 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AU3891301A true AU3891301A (en) | 2002-04-11 |
| AU776423B2 AU776423B2 (en) | 2004-09-09 |
Family
ID=25588938
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU38913/01A Ceased AU776423B2 (en) | 2000-10-10 | 2001-04-27 | Sulphur dioxide generator |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US7045182B2 (en) |
| EP (1) | EP1197441A3 (en) |
| AU (1) | AU776423B2 (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB0228870D0 (en) * | 2002-12-10 | 2003-01-15 | Ace Three Uk Ltd | Sulphur dioxide release coastings |
| US20060083826A1 (en) * | 2004-10-20 | 2006-04-20 | Baeremaecker Jean M O | Device for the transportation and storage of edible produces within a preserving gaseous atmosphere |
| US8932708B2 (en) | 2007-10-17 | 2015-01-13 | Intellipack Quimas S.A. | Antimicrobial gas generating system |
| CN102864693A (en) * | 2012-10-09 | 2013-01-09 | 新疆农业科学院农产品贮藏加工研究所 | Compound preservative paper for honeydews and method for manufacturing compound preservative paper |
| WO2015170264A1 (en) | 2014-05-06 | 2015-11-12 | Grapetek (Pty) Ltd | Flower preservation method and device |
| GB2532758A (en) * | 2014-11-27 | 2016-06-01 | Tessara (Pty) Ltd | Antifungal slipcover |
| WO2017015770A1 (en) * | 2015-07-27 | 2017-02-02 | Davanzo Caram Mauricio Agustín | Harvest and fumigation crate |
| GB2542340B (en) * | 2015-09-11 | 2019-05-01 | Agricultural Res Council Arc | Membrane and method for preservation of produce |
| WO2024150052A1 (en) | 2023-01-09 | 2024-07-18 | Tessara (Pty) Ltd | Preservative and anti-fungal packaging device |
| WO2024150053A1 (en) | 2023-01-09 | 2024-07-18 | Tessara (Pty) Ltd | Flower preservative and anti-fungal system |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4041209A (en) * | 1975-01-27 | 1977-08-09 | Scholle Corporation | Multiple wall packaging material containing sulfite compound |
| JPS57194961A (en) * | 1981-05-12 | 1982-11-30 | Mitsubishi Gas Chemical Co | Package of deoxidizer |
| US4748904A (en) * | 1986-07-01 | 1988-06-07 | Razeto Andres V R | Chlorine generator for preservation of fruits and vegetables |
| IN170021B (en) * | 1987-05-26 | 1992-01-25 | Deita Freyberg Gmbh | |
| ZA89691B (en) * | 1988-07-04 | 1990-09-26 | Charles Clemes Dennis | Sulphur dioxide generators |
| ZA933573B (en) * | 1992-05-21 | 1993-12-13 | Dennis Charles Clemes | Sulphur dioxide generators |
| US6046243A (en) * | 1993-02-12 | 2000-04-04 | Bernard Technologies, Inc. | Compositions for sustained release of a gas |
| US5711211A (en) * | 1997-01-31 | 1998-01-27 | Embalajes Proem Limitada | Chlorine generator for preservation of fruits and vegetables |
| US6033705A (en) * | 1998-07-08 | 2000-03-07 | Isaacs; Charles E. | Method for treating foodstuffs to reduce or prevent microbial activity |
-
2001
- 2001-04-19 EP EP01303558A patent/EP1197441A3/en not_active Withdrawn
- 2001-04-27 AU AU38913/01A patent/AU776423B2/en not_active Ceased
- 2001-05-04 US US09/848,255 patent/US7045182B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US20020041939A1 (en) | 2002-04-11 |
| EP1197441A3 (en) | 2003-05-02 |
| AU776423B2 (en) | 2004-09-09 |
| US7045182B2 (en) | 2006-05-16 |
| EP1197441A2 (en) | 2002-04-17 |
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